Re: [scikit-learn] scikit-learn twitter account

2019-11-25 Thread Olivier Grisel
I have created the https://twitter.com/sklearn_commits twitter account.

I have applied to make this account a "Twitter Developer" account to
be able to use https://github.com/filearts/tweethook to register it as
a webhook for the main scikit-learn github repo.

Once ready, I will remove the old webhook currently registered on
@scikit_learn account and would like to tweet about the transfer as
drafted here:

https://hackmd.io/@4rHCRgfySZSdd5eMtfUJiA/H1CSpuF2S/edit

Please feel free to let me know if you have any comment / suggestion
about this plan.

-- 
Olivier
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Re: [scikit-learn] SVM-RFE

2019-11-25 Thread Malik Yousef
It does not provide access for tracing the step by step feature weights and
predictive ability- The user provides the n_feature.

Malik

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*Prof. Malik Yousef (Associate Professor)  *
*The Head of the** Galilee Digital Health Research Center (GDH)*

*Zefat Academic College , Department of Information System  *
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On Mon, Nov 25, 2019 at 1:36 PM Brown J.B. via scikit-learn <
scikit-learn@python.org> wrote:

>
> 2019年11月23日(土) 2:12 Andreas Mueller :
>
>> I think you can also use RFECV directly without doing any wrapping.
>>
>> Your request to do performance checking of the steps of SVM-RFE is a
>> pretty common task.
>>
>>
> Yes, RFECV works well (and I should know as an appreciative long-time user
> ;-)  ), but does it actually provide a mechanism (accessors) for tracing
> the step by step feature weights and predictive ability as the features are
> continually reduced?
> (Or perhaps it's because I'm looking at 0.20.1 and 0.21.2
> documentation...?)
>
> J.B.
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Re: [scikit-learn] SVM-RFE

2019-11-25 Thread Brown J.B. via scikit-learn
2019年11月23日(土) 2:12 Andreas Mueller :

> I think you can also use RFECV directly without doing any wrapping.
>
> Your request to do performance checking of the steps of SVM-RFE is a
> pretty common task.
>
>
Yes, RFECV works well (and I should know as an appreciative long-time user
;-)  ), but does it actually provide a mechanism (accessors) for tracing
the step by step feature weights and predictive ability as the features are
continually reduced?
(Or perhaps it's because I'm looking at 0.20.1 and 0.21.2 documentation...?)

J.B.
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Re: [scikit-learn] PolynomialFeatures

2019-11-25 Thread Sole Galli
Hi Michael, Nicolas,

Thank you both, that is very helpful!

Best wishes

Sole

On Sun, 24 Nov 2019 at 03:37, Michael Eickenberg <
michael.eickenb...@gmail.com> wrote:

> I think it might generate a basis that is capable of generating what you
> describe above, but feature expansion concretely reads as
>
> 1, a, b, c, a ** 2, ab, ac, b ** 2, bc, c ** 2, a ** 3, a ** 2 * b, a ** 2
> * c, a* b ** 2, abc, a*c**2, b**3, b**2 * c, b*c**2, c**3
>
> Hope this helps
>
> On Fri, Nov 22, 2019 at 8:50 AM Sole Galli  wrote:
>
>> Hello team,
>>
>> Can I double check with you that I understand correctly what the
>> PolynomialFeatures() is doing under the hood?
>>
>> If I set it like this:
>>
>> poly = PolynomialFeatures(degree=3, interaction_only=False,
>> include_bias=False)
>>
>> and I fit it on a dataset with 3 variables, a,b and c.
>>
>> Am I correct to say that the fit() method creates all possible
>> combinations like this:
>> a;
>> b;
>> c;
>> (a+b)^2
>> (a+b)^3
>> (a+c)^2
>> (a+c)^3
>> (c+b)^2
>> (c+b)^3
>> (a+b+c)^2
>> (a+b+c)^3
>>
>> And the transform() generates the expansion, without the constant that
>> multiplies the interactions and avoiding duplicated terms after the
>> expansion?
>>
>> Thanks for the help.
>>
>> Kind regards
>>
>> Sole
>>
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